windows 如何让 QT 应用程序写入崩溃日志
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/6978675/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to make QT Application write a crash log
提问by maxchirag
i am working on project developed in Qt, Windows, i use Qt Version 4.1.4 and VC6 IDE for compiling project, most of usage of product are on WindowsXp.
我正在从事在 Qt、Windows 中开发的项目，我使用 Qt 版本 4.1.4 和 VC6 IDE 来编译项目，产品的大部分使用都在 WindowsXp 上。
i frequently receive crash reports from testers and customers which does not have fix pattern and does not reproduce in my development environment.
我经常收到来自测试人员和客户的崩溃报告，这些报告没有修复模式，也不会在我的开发环境中重现。
so i come to the conclusion that i need to write a crash log from my program so that i always get the call stack when program is crashed.
所以我得出的结论是，我需要从我的程序中写入一个崩溃日志，以便在程序崩溃时我总能得到调用堆栈。
in linux i know its possible to do it with some signal handling of segmentation fault. but how to do the same thing in windows/C++?
在 linux 中，我知道可以通过一些分段错误的信号处理来做到这一点。但是如何在 windows/C++ 中做同样的事情？
i tried to search on Google to find some ready made solution but without any luck.
我试图在 Google 上搜索以找到一些现成的解决方案，但没有任何运气。
Suggestion regarding any third party tools/libraries (free or licensed) are also accepted, but please do not suggest any method where i have to modify each function in my module to get log, because the project is huge and i can not afford that.
也接受有关任何第三方工具/库（免费或许可）的建议，但请不要建议我必须修改模块中的每个功能以获取日志的任何方法，因为项目很大，我负担不起。
thanks in advance.
提前致谢。
updates. I have attached StackWalker to my Code now (with bit of hassle of _MBCS & UNICODE) but atleast managed to attach it.
更新。我现在已经将 StackWalker 附加到我的代码中（有点麻烦 _MBCS 和 UNICODE），但至少设法附加了它。
my main file looks like below,
我的主文件如下所示，
class MyStackWalker : public StackWalker
{
FILE *sgLogFile;
public:
MyStackWalker() : StackWalker()
{
sgLogFile = fopen("ThisIsWhatIcallLog.log", "w");
}
MyStackWalker(DWORD dwProcessId, HANDLE hProcess) : StackWalker(dwProcessId, hProcess)
{
}
virtual void OnOutput(LPCSTR szText)
{
printf(szText);
fprintf(sgLogFile, "%s",szText);
fclose(sgLogFile);
StackWalker::OnOutput(szText);
}
};
LONG Win32FaultHandler(struct _EXCEPTION_POINTERS * ExInfo)
{
MyStackWalker sw;
sw.ShowCallstack();
return EXCEPTION_EXECUTE_HANDLER;
}
void InstallFaultHandler()
{
SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER) Win32FaultHandler);
}
But i get linker error now that symbols are not found,
但是由于找不到符号，我收到链接器错误，
main.obj : error LNK2001: unresolved external symbol "public: int __thiscall StackWalker::ShowCallstack(void *,struct _CONTEXT const *,int (__stdcall*)(void *,unsigned __int64,void *,int,unsigned long *,void *),void *)" (?ShowCallstack@StackWalker@@QAEHPAXPBU_CONTEXT@@P6GH0_K0HPAK0@Z0@Z)
main.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall StackWalker::OnDbgHelpErr(char const *,int,unsigned __int64)(?OnDbgHelpErr@StackWalker@@MAEXPBDH_K@Z)
main.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall StackWalker::OnLoadModule(char const *,char const *,unsigned __int64,int,int,char const *,char const *,unsigned __int64)" (?OnLoadModule@StackWalker@@MAEXPBD0_KHH001@Z)
main.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall StackWalker::OnSymInit(char const *,int,char const *)" (?OnSymInit@StackWalker@@MAEXPBDH0@Z)
main.obj : error LNK2001: unresolved external symbol "public: __thiscall StackWalker::StackWalker(int,char const *,int,void *)" (??0StackWalker@@QAE@HPBDHPAX@Z)
release/Prog.exe : fatal error LNK1120: 5 unresolved externals
Error executing link.exe.
I have modified the StackWalker.cpp file to adapt to the UNICODE support, replaced "_tcscat_s" with "wcscat".
我修改了 StackWalker.cpp 文件以适应 UNICODE 支持，将“_tcscat_s”替换为“wcscat”。
can you see, what's going wrong here?
你能看到这里有什么问题吗？
采纳答案by elevener
For cross-platform application Breakpad is probably better solution. But easy way for Windows -is to set unhandled exception handler via SetUnhandledExceptionFilter and write minidumps (with configuration you need) with WriteMiniDumpEx in handler.
对于跨平台应用程序 Breakpad 可能是更好的解决方案。但 Windows 的简单方法是通过 SetUnhandledExceptionFilter 设置未处理的异常处理程序，并在处理程序中使用 WriteMiniDumpEx 编写小型转储（带有您需要的配置）。
回答by Macke
Google Breakpadis a cross-platform crash-report library that seems useful.
Google Breakpad是一个看起来很有用的跨平台崩溃报告库。
See also the StackWalkerfor some windows-only code for getting a stack trace.
另请参阅StackWalker以获取一些用于获取堆栈跟踪的仅限 Windows 的代码。
Also, installing an event filter by overriding QCoreApplication::notifyand catch all exceptions (including asyncronous ones such as stack overflow and access violation on Windows) is a good idea.
此外，通过覆盖QCoreApplication::notify和捕获所有异常（包括异步异常，例如 Windows 上的堆栈溢出和访问冲突）来安装事件过滤器是一个好主意。
